make[3]: warning:  Clock skew detected.  Your build may be incomplete.
  LD      sound/core/built-in.o
sound/core/seq/built-in.o(.exit.text+0x180): In function `cleanup_module':
: multiple definition of `cleanup_module'
sound/core/snd-rawmidi.o(.exit.text+0x0): first defined here
sound/core/seq/built-in.o(.init.text+0x9a0): In function `init_module':
: multiple definition of `init_module'
sound/core/snd-rawmidi.o(.init.text+0x0): first defined here
ld: Warning: size of symbol `init_module' changed from 140 in sound/core/snd-rawmidi.o to 63 in sound/core/seq/built-in.o
make[2]: *** [sound/core/built-in.o] Error 1
make[1]: *** [sound/core] Error 2
make: *** [sound] Error 2